Alternative Energy

Cellulosic Ethanol: The Fuel of the Future?

High petroleum prices have reinvigorated interest in biofuels -- and a number of second-gen biofuel stocks could be ready to catch a rising tide. More 

Natural Gas: Winner by Default?

Smart, routine use of natural gas for transportation is still a long way away, but its prospects beat any other source you can name. More 

Is This the Spark Green Vehicles Need?

Obama's 'All-of-the-above' alternative fuels push is raising hopes. But even if Congress approves, it'll be years before companies see the benefits. More 

Researchers Explore Wastewater’s Renewable-Energy Potential

Chemical energy from wastewater treatment can produce enough electricity to power major water treatment systems, new research shows. More 

3 Shocking Energy Trends That Should Scare Investors

Energy is the lifeblood of the global economy -- so when negative trends start popping up, investors should take notice. More 

Westport Innovations Should Make Investors Wary

This classic momentum play could burn a lot of traders. More 

3 Hot Cleantech IPOs – Solazyme, Amyris and Gevo

With expensive oil, now may be the time to bet on some clean energy start-ups just starting to get attention. More